Dedebulak Fm., (Cambrian to of Kyrgyzstan)

Where: Kyrgyzstan (39.8° N, 72.0° E: paleocoordinates 3.6° N, 105.6° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Dedebulak Formation, Botomian to Botomian (516.0 - 510.2 Ma)

• Specimens come from a block of Lower Cambrian limestone contained WITHIN the SILURIAN age Dedebulak Formation.

• formation-level stratigraphic resolution

Environment/lithology: lithified limestone

• limestone block

Preservation: original calcite, replaced with silica

Collection methods: chemical,

• This is one of the most representative collections of calcareous brachiopods (secondary silicification) known from the Botomian. The collection is housed in the museum of the F.N. Chernyshev Central Scientific Research Geologic Exploration Institute in Leningrad, as Collection No. 12589.

Primary reference: L. Y. Popov and Y. A. Tikhonov. 1990. Early Cambrian Brachiopods from Southern Kirgizia. Paleontological Journal 24(3):30-44 [M. Patzkowsky/P. Borkow]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 9979: authorized by Mark Patzkowsky, entered by Phil Borkow on 05.02.2001

Creative Commons license: CC BY (attribution)

Taxonomic list

 Chileida - Chileidae
Chile mirabilis n. sp. Popov and Tikhonov 1990
44 seperate valves and 4 complete shells
 Kutorginida - Nisusiidae
Nisusia alaica n. sp.
6 complete shells, 250 pdicle and 286 brachial valves
 Kutorginida - Kutorginidae
Kutorgina catenata n. sp. Koneva 1979
2 complete shells, 171 pedicle and 22 brachial valves.
 Naukatida - Naukatidae
Naukat proprium n. sp.
3 complete shells and 12 pedicle valves
Oina rotunda n. sp.
49 complete shells, 135 pedicle and 120 brachial valves